Twist-three Observables in Deeply Virtual Compton Scattering on the Nucleon

نویسندگان

  • A. V. Belitsky
  • A. Kirchner
  • D. Müller
  • A. Schäfer
چکیده

We study twist-three effects in deeply virtual Compton scattering on an unpolarized spin-1/2 target. A careful definition of observables as Fourier moments w.r.t. the azimuthal angle allows for a clear separation of twist-two and-three effects. Although the latter are power suppressed, they give leading contributions to the twist-three asymmetries and do not affect the twist-two observables.

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تاریخ انتشار 2001